[R] How to get around heteroscedasticity with non-linear least squares in R?

[Christian Ritz]

Hi Quin,

the package 'drc' on CRAN deals with modelling dose-response curves.

Moreover it allows adjustment for heterogeneity by means of 


  transformation (Box-Cox transformation)

  modelling the variance as a power of the mean.


See the package documentation for more features.


Christian